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-rw-r--r--hw/block/fdc.c296
-rw-r--r--hw/ide/macio.c271
2 files changed, 322 insertions, 245 deletions
diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index d8a8edd936..6e794597dc 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -324,7 +324,7 @@ static void fd_revalidate(FDrive *drv)
/* Intel 82078 floppy disk controller emulation */
static void fdctrl_reset(FDCtrl *fdctrl, int do_irq);
-static void fdctrl_reset_fifo(FDCtrl *fdctrl);
+static void fdctrl_to_command_phase(FDCtrl *fdctrl);
static int fdctrl_transfer_handler (void *opaque, int nchan,
int dma_pos, int dma_len);
static void fdctrl_raise_irq(FDCtrl *fdctrl);
@@ -495,6 +495,33 @@ enum {
FD_DIR_DSKCHG = 0x80,
};
+/*
+ * See chapter 5.0 "Controller phases" of the spec:
+ *
+ * Command phase:
+ * The host writes a command and its parameters into the FIFO. The command
+ * phase is completed when all parameters for the command have been supplied,
+ * and execution phase is entered.
+ *
+ * Execution phase:
+ * Data transfers, either DMA or non-DMA. For non-DMA transfers, the FIFO
+ * contains the payload now, otherwise it's unused. When all bytes of the
+ * required data have been transferred, the state is switched to either result
+ * phase (if the command produces status bytes) or directly back into the
+ * command phase for the next command.
+ *
+ * Result phase:
+ * The host reads out the FIFO, which contains one or more result bytes now.
+ */
+enum {
+ /* Only for migration: reconstruct phase from registers like qemu 2.3 */
+ FD_PHASE_RECONSTRUCT = 0,
+
+ FD_PHASE_COMMAND = 1,
+ FD_PHASE_EXECUTION = 2,
+ FD_PHASE_RESULT = 3,
+};
+
#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
#define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
@@ -504,6 +531,7 @@ struct FDCtrl {
/* Controller state */
QEMUTimer *result_timer;
int dma_chann;
+ uint8_t phase;
/* Controller's identification */
uint8_t version;
/* HW */
@@ -744,6 +772,28 @@ static const VMStateDescription vmstate_fdrive = {
}
};
+/*
+ * Reconstructs the phase from register values according to the logic that was
+ * implemented in qemu 2.3. This is the default value that is used if the phase
+ * subsection is not present on migration.
+ *
+ * Don't change this function to reflect newer qemu versions, it is part of
+ * the migration ABI.
+ */
+static int reconstruct_phase(FDCtrl *fdctrl)
+{
+ if (fdctrl->msr & FD_MSR_NONDMA) {
+ return FD_PHASE_EXECUTION;
+ } else if ((fdctrl->msr & FD_MSR_RQM) == 0) {
+ /* qemu 2.3 disabled RQM only during DMA transfers */
+ return FD_PHASE_EXECUTION;
+ } else if (fdctrl->msr & FD_MSR_DIO) {
+ return FD_PHASE_RESULT;
+ } else {
+ return FD_PHASE_COMMAND;
+ }
+}
+
static void fdc_pre_save(void *opaque)
{
FDCtrl *s = opaque;
@@ -751,12 +801,24 @@ static void fdc_pre_save(void *opaque)
s->dor_vmstate = s->dor | GET_CUR_DRV(s);
}
+static int fdc_pre_load(void *opaque)
+{
+ FDCtrl *s = opaque;
+ s->phase = FD_PHASE_RECONSTRUCT;
+ return 0;
+}
+
static int fdc_post_load(void *opaque, int version_id)
{
FDCtrl *s = opaque;
SET_CUR_DRV(s, s->dor_vmstate & FD_DOR_SELMASK);
s->dor = s->dor_vmstate & ~FD_DOR_SELMASK;
+
+ if (s->phase == FD_PHASE_RECONSTRUCT) {
+ s->phase = reconstruct_phase(s);
+ }
+
return 0;
}
@@ -794,11 +856,29 @@ static const VMStateDescription vmstate_fdc_result_timer = {
}
};
+static bool fdc_phase_needed(void *opaque)
+{
+ FDCtrl *fdctrl = opaque;
+
+ return reconstruct_phase(fdctrl) != fdctrl->phase;
+}
+
+static const VMStateDescription vmstate_fdc_phase = {
+ .name = "fdc/phase",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT8(phase, FDCtrl),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
static const VMStateDescription vmstate_fdc = {
.name = "fdc",
.version_id = 2,
.minimum_version_id = 2,
.pre_save = fdc_pre_save,
+ .pre_load = fdc_pre_load,
.post_load = fdc_post_load,
.fields = (VMStateField[]) {
/* Controller State */
@@ -839,6 +919,9 @@ static const VMStateDescription vmstate_fdc = {
.vmsd = &vmstate_fdc_result_timer,
.needed = fdc_result_timer_needed,
} , {
+ .vmsd = &vmstate_fdc_phase,
+ .needed = fdc_phase_needed,
+ } , {
/* empty */
}
}
@@ -918,7 +1001,7 @@ static void fdctrl_reset(FDCtrl *fdctrl, int do_irq)
fdctrl->data_dir = FD_DIR_WRITE;
for (i = 0; i < MAX_FD; i++)
fd_recalibrate(&fdctrl->drives[i]);
- fdctrl_reset_fifo(fdctrl);
+ fdctrl_to_command_phase(fdctrl);
if (do_irq) {
fdctrl->status0 |= FD_SR0_RDYCHG;
fdctrl_raise_irq(fdctrl);
@@ -1134,17 +1217,22 @@ static uint32_t fdctrl_read_dir(FDCtrl *fdctrl)
return retval;
}
-/* FIFO state control */
-static void fdctrl_reset_fifo(FDCtrl *fdctrl)
+/* Clear the FIFO and update the state for receiving the next command */
+static void fdctrl_to_command_phase(FDCtrl *fdctrl)
{
+ fdctrl->phase = FD_PHASE_COMMAND;
fdctrl->data_dir = FD_DIR_WRITE;
fdctrl->data_pos = 0;
+ fdctrl->data_len = 1; /* Accept command byte, adjust for params later */
fdctrl->msr &= ~(FD_MSR_CMDBUSY | FD_MSR_DIO);
+ fdctrl->msr |= FD_MSR_RQM;
}
-/* Set FIFO status for the host to read */
-static void fdctrl_set_fifo(FDCtrl *fdctrl, int fifo_len)
+/* Update the state to allow the guest to read out the command status.
+ * @fifo_len is the number of result bytes to be read out. */
+static void fdctrl_to_result_phase(FDCtrl *fdctrl, int fifo_len)
{
+ fdctrl->phase = FD_PHASE_RESULT;
fdctrl->data_dir = FD_DIR_READ;
fdctrl->data_len = fifo_len;
fdctrl->data_pos = 0;
@@ -1157,7 +1245,7 @@ static void fdctrl_unimplemented(FDCtrl *fdctrl, int direction)
qemu_log_mask(LOG_UNIMP, "fdc: unimplemented command 0x%02x\n",
fdctrl->fifo[0]);
fdctrl->fifo[0] = FD_SR0_INVCMD;
- fdctrl_set_fifo(fdctrl, 1);
+ fdctrl_to_result_phase(fdctrl, 1);
}
/* Seek to next sector
@@ -1238,7 +1326,7 @@ static void fdctrl_stop_transfer(FDCtrl *fdctrl, uint8_t status0,
fdctrl->msr |= FD_MSR_RQM | FD_MSR_DIO;
fdctrl->msr &= ~FD_MSR_NONDMA;
- fdctrl_set_fifo(fdctrl, 7);
+ fdctrl_to_result_phase(fdctrl, 7);
fdctrl_raise_irq(fdctrl);
}
@@ -1352,7 +1440,7 @@ static void fdctrl_start_transfer(FDCtrl *fdctrl, int direction)
}
}
FLOPPY_DPRINTF("start non-DMA transfer\n");
- fdctrl->msr |= FD_MSR_NONDMA;
+ fdctrl->msr |= FD_MSR_NONDMA | FD_MSR_RQM;
if (direction != FD_DIR_WRITE)
fdctrl->msr |= FD_MSR_DIO;
/* IO based transfer: calculate len */
@@ -1505,9 +1593,16 @@ static uint32_t fdctrl_read_data(FDCtrl *fdctrl)
FLOPPY_DPRINTF("error: controller not ready for reading\n");
return 0;
}
+
+ /* If data_len spans multiple sectors, the current position in the FIFO
+ * wraps around while fdctrl->data_pos is the real position in the whole
+ * request. */
pos = fdctrl->data_pos;
pos %= FD_SECTOR_LEN;
- if (fdctrl->msr & FD_MSR_NONDMA) {
+
+ switch (fdctrl->phase) {
+ case FD_PHASE_EXECUTION:
+ assert(fdctrl->msr & FD_MSR_NONDMA);
if (pos == 0) {
if (fdctrl->data_pos != 0)
if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
@@ -1523,20 +1618,28 @@ static uint32_t fdctrl_read_data(FDCtrl *fdctrl)
memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
}
}
- }
- retval = fdctrl->fifo[pos];
- if (++fdctrl->data_pos == fdctrl->data_len) {
- fdctrl->data_pos = 0;
- /* Switch from transfer mode to status mode
- * then from status mode to command mode
- */
- if (fdctrl->msr & FD_MSR_NONDMA) {
+
+ if (++fdctrl->data_pos == fdctrl->data_len) {
+ fdctrl->msr &= ~FD_MSR_RQM;
fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
- } else {
- fdctrl_reset_fifo(fdctrl);
+ }
+ break;
+
+ case FD_PHASE_RESULT:
+ assert(!(fdctrl->msr & FD_MSR_NONDMA));
+ if (++fdctrl->data_pos == fdctrl->data_len) {
+ fdctrl->msr &= ~FD_MSR_RQM;
+ fdctrl_to_command_phase(fdctrl);
fdctrl_reset_irq(fdctrl);
}
+ break;
+
+ case FD_PHASE_COMMAND:
+ default:
+ abort();
}
+
+ retval = fdctrl->fifo[pos];
FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
return retval;
@@ -1606,7 +1709,7 @@ static void fdctrl_handle_lock(FDCtrl *fdctrl, int direction)
{
fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0;
fdctrl->fifo[0] = fdctrl->lock << 4;
- fdctrl_set_fifo(fdctrl, 1);
+ fdctrl_to_result_phase(fdctrl, 1);
}
static void fdctrl_handle_dumpreg(FDCtrl *fdctrl, int direction)
@@ -1631,20 +1734,20 @@ static void fdctrl_handle_dumpreg(FDCtrl *fdctrl, int direction)
(cur_drv->perpendicular << 2);
fdctrl->fifo[8] = fdctrl->config;
fdctrl->fifo[9] = fdctrl->precomp_trk;
- fdctrl_set_fifo(fdctrl, 10);
+ fdctrl_to_result_phase(fdctrl, 10);
}
static void fdctrl_handle_version(FDCtrl *fdctrl, int direction)
{
/* Controller's version */
fdctrl->fifo[0] = fdctrl->version;
- fdctrl_set_fifo(fdctrl, 1);
+ fdctrl_to_result_phase(fdctrl, 1);
}
static void fdctrl_handle_partid(FDCtrl *fdctrl, int direction)
{
fdctrl->fifo[0] = 0x41; /* Stepping 1 */
- fdctrl_set_fifo(fdctrl, 1);
+ fdctrl_to_result_phase(fdctrl, 1);
}
static void fdctrl_handle_restore(FDCtrl *fdctrl, int direction)
@@ -1667,7 +1770,7 @@ static void fdctrl_handle_restore(FDCtrl *fdctrl, int direction)
fdctrl->config = fdctrl->fifo[11];
fdctrl->precomp_trk = fdctrl->fifo[12];
fdctrl->pwrd = fdctrl->fifo[13];
- fdctrl_reset_fifo(fdctrl);
+ fdctrl_to_command_phase(fdctrl);
}
static void fdctrl_handle_save(FDCtrl *fdctrl, int direction)
@@ -1697,7 +1800,7 @@ static void fdctrl_handle_save(FDCtrl *fdctrl, int direction)
fdctrl->fifo[12] = fdctrl->pwrd;
fdctrl->fifo[13] = 0;
fdctrl->fifo[14] = 0;
- fdctrl_set_fifo(fdctrl, 15);
+ fdctrl_to_result_phase(fdctrl, 15);
}
static void fdctrl_handle_readid(FDCtrl *fdctrl, int direction)
@@ -1746,7 +1849,7 @@ static void fdctrl_handle_specify(FDCtrl *fdctrl, int direction)
else
fdctrl->dor |= FD_DOR_DMAEN;
/* No result back */
- fdctrl_reset_fifo(fdctrl);
+ fdctrl_to_command_phase(fdctrl);
}
static void fdctrl_handle_sense_drive_status(FDCtrl *fdctrl, int direction)
@@ -1762,7 +1865,7 @@ static void fdctrl_handle_sense_drive_status(FDCtrl *fdctrl, int direction)
(cur_drv->head << 2) |
GET_CUR_DRV(fdctrl) |
0x28;
- fdctrl_set_fifo(fdctrl, 1);
+ fdctrl_to_result_phase(fdctrl, 1);
}
static void fdctrl_handle_recalibrate(FDCtrl *fdctrl, int direction)
@@ -1772,7 +1875,7 @@ static void fdctrl_handle_recalibrate(FDCtrl *fdctrl, int direction)
SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
cur_drv = get_cur_drv(fdctrl);
fd_recalibrate(cur_drv);
- fdctrl_reset_fifo(fdctrl);
+ fdctrl_to_command_phase(fdctrl);
/* Raise Interrupt */
fdctrl->status0 |= FD_SR0_SEEK;
fdctrl_raise_irq(fdctrl);
@@ -1788,7 +1891,7 @@ static void fdctrl_handle_sense_interrupt_status(FDCtrl *fdctrl, int direction)
fdctrl->reset_sensei--;
} else if (!(fdctrl->sra & FD_SRA_INTPEND)) {
fdctrl->fifo[0] = FD_SR0_INVCMD;
- fdctrl_set_fifo(fdctrl, 1);
+ fdctrl_to_result_phase(fdctrl, 1);
return;
} else {
fdctrl->fifo[0] =
@@ -1797,7 +1900,7 @@ static void fdctrl_handle_sense_interrupt_status(FDCtrl *fdctrl, int direction)
}
fdctrl->fifo[1] = cur_drv->track;
- fdctrl_set_fifo(fdctrl, 2);
+ fdctrl_to_result_phase(fdctrl, 2);
fdctrl_reset_irq(fdctrl);
fdctrl->status0 = FD_SR0_RDYCHG;
}
@@ -1808,7 +1911,7 @@ static void fdctrl_handle_seek(FDCtrl *fdctrl, int direction)
SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
cur_drv = get_cur_drv(fdctrl);
- fdctrl_reset_fifo(fdctrl);
+ fdctrl_to_command_phase(fdctrl);
/* The seek command just sends step pulses to the drive and doesn't care if
* there is a medium inserted of if it's banging the head against the drive.
*/
@@ -1825,7 +1928,7 @@ static void fdctrl_handle_perpendicular_mode(FDCtrl *fdctrl, int direction)
if (fdctrl->fifo[1] & 0x80)
cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
/* No result back */
- fdctrl_reset_fifo(fdctrl);
+ fdctrl_to_command_phase(fdctrl);
}
static void fdctrl_handle_configure(FDCtrl *fdctrl, int direction)
@@ -1833,20 +1936,20 @@ static void fdctrl_handle_configure(FDCtrl *fdctrl, int direction)
fdctrl->config = fdctrl->fifo[2];
fdctrl->precomp_trk = fdctrl->fifo[3];
/* No result back */
- fdctrl_reset_fifo(fdctrl);
+ fdctrl_to_command_phase(fdctrl);
}
static void fdctrl_handle_powerdown_mode(FDCtrl *fdctrl, int direction)
{
fdctrl->pwrd = fdctrl->fifo[1];
fdctrl->fifo[0] = fdctrl->fifo[1];
- fdctrl_set_fifo(fdctrl, 1);
+ fdctrl_to_result_phase(fdctrl, 1);
}
static void fdctrl_handle_option(FDCtrl *fdctrl, int direction)
{
/* No result back */
- fdctrl_reset_fifo(fdctrl);
+ fdctrl_to_command_phase(fdctrl);
}
static void fdctrl_handle_drive_specification_command(FDCtrl *fdctrl, int direction)
@@ -1862,15 +1965,15 @@ static void fdctrl_handle_drive_specification_command(FDCtrl *fdctrl, int direct
fdctrl->fifo[0] = fdctrl->fifo[1];
fdctrl->fifo[2] = 0;
fdctrl->fifo[3] = 0;
- fdctrl_set_fifo(fdctrl, 4);
+ fdctrl_to_result_phase(fdctrl, 4);
} else {
- fdctrl_reset_fifo(fdctrl);
+ fdctrl_to_command_phase(fdctrl);
}
} else if (fdctrl->data_len > 7) {
/* ERROR */
fdctrl->fifo[0] = 0x80 |
(cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
- fdctrl_set_fifo(fdctrl, 1);
+ fdctrl_to_result_phase(fdctrl, 1);
}
}
@@ -1887,7 +1990,7 @@ static void fdctrl_handle_relative_seek_in(FDCtrl *fdctrl, int direction)
fd_seek(cur_drv, cur_drv->head,
cur_drv->track + fdctrl->fifo[2], cur_drv->sect, 1);
}
- fdctrl_reset_fifo(fdctrl);
+ fdctrl_to_command_phase(fdctrl);
/* Raise Interrupt */
fdctrl->status0 |= FD_SR0_SEEK;
fdctrl_raise_irq(fdctrl);
@@ -1905,20 +2008,25 @@ static void fdctrl_handle_relative_seek_out(FDCtrl *fdctrl, int direction)
fd_seek(cur_drv, cur_drv->head,
cur_drv->track - fdctrl->fifo[2], cur_drv->sect, 1);
}
- fdctrl_reset_fifo(fdctrl);
+ fdctrl_to_command_phase(fdctrl);
/* Raise Interrupt */
fdctrl->status0 |= FD_SR0_SEEK;
fdctrl_raise_irq(fdctrl);
}
-static const struct {
+/*
+ * Handlers for the execution phase of each command
+ */
+typedef struct FDCtrlCommand {
uint8_t value;
uint8_t mask;
const char* name;
int parameters;
void (*handler)(FDCtrl *fdctrl, int direction);
int direction;
-} handlers[] = {
+} FDCtrlCommand;
+
+static const FDCtrlCommand handlers[] = {
{ FD_CMD_READ, 0x1f, "READ", 8, fdctrl_start_transfer, FD_DIR_READ },
{ FD_CMD_WRITE, 0x3f, "WRITE", 8, fdctrl_start_transfer, FD_DIR_WRITE },
{ FD_CMD_SEEK, 0xff, "SEEK", 2, fdctrl_handle_seek },
@@ -1955,9 +2063,19 @@ static const struct {
/* Associate command to an index in the 'handlers' array */
static uint8_t command_to_handler[256];
+static const FDCtrlCommand *get_command(uint8_t cmd)
+{
+ int idx;
+
+ idx = command_to_handler[cmd];
+ FLOPPY_DPRINTF("%s command\n", handlers[idx].name);
+ return &handlers[idx];
+}
+
static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value)
{
FDrive *cur_drv;
+ const FDCtrlCommand *cmd;
uint32_t pos;
/* Reset mode */
@@ -1970,12 +2088,27 @@ static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value)
return;
}
fdctrl->dsr &= ~FD_DSR_PWRDOWN;
- /* Is it write command time ? */
- if (fdctrl->msr & FD_MSR_NONDMA) {
+
+ FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
+
+ /* If data_len spans multiple sectors, the current position in the FIFO
+ * wraps around while fdctrl->data_pos is the real position in the whole
+ * request. */
+ pos = fdctrl->data_pos++;
+ pos %= FD_SECTOR_LEN;
+ fdctrl->fifo[pos] = value;
+
+ if (fdctrl->data_pos == fdctrl->data_len) {
+ fdctrl->msr &= ~FD_MSR_RQM;
+ }
+
+ switch (fdctrl->phase) {
+ case FD_PHASE_EXECUTION:
+ /* For DMA requests, RQM should be cleared during execution phase, so
+ * we would have errored out above. */
+ assert(fdctrl->msr & FD_MSR_NONDMA);
+
/* FIFO data write */
- pos = fdctrl->data_pos++;
- pos %= FD_SECTOR_LEN;
- fdctrl->fifo[pos] = value;
if (pos == FD_SECTOR_LEN - 1 ||
fdctrl->data_pos == fdctrl->data_len) {
cur_drv = get_cur_drv(fdctrl);
@@ -1983,45 +2116,54 @@ static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value)
< 0) {
FLOPPY_DPRINTF("error writing sector %d\n",
fd_sector(cur_drv));
- return;
+ break;
}
if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
FLOPPY_DPRINTF("error seeking to next sector %d\n",
fd_sector(cur_drv));
- return;
+ break;
}
}
- /* Switch from transfer mode to status mode
- * then from status mode to command mode
- */
- if (fdctrl->data_pos == fdctrl->data_len)
+
+ /* Switch to result phase when done with the transfer */
+ if (fdctrl->data_pos == fdctrl->data_len) {
fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
- return;
- }
- if (fdctrl->data_pos == 0) {
- /* Command */
- pos = command_to_handler[value & 0xff];
- FLOPPY_DPRINTF("%s command\n", handlers[pos].name);
- fdctrl->data_len = handlers[pos].parameters + 1;
- fdctrl->msr |= FD_MSR_CMDBUSY;
- }
+ }
+ break;
- FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
- pos = fdctrl->data_pos++;
- pos %= FD_SECTOR_LEN;
- fdctrl->fifo[pos] = value;
- if (fdctrl->data_pos == fdctrl->data_len) {
- /* We now have all parameters
- * and will be able to treat the command
- */
- if (fdctrl->data_state & FD_STATE_FORMAT) {
- fdctrl_format_sector(fdctrl);
- return;
+ case FD_PHASE_COMMAND:
+ assert(!(fdctrl->msr & FD_MSR_NONDMA));
+ assert(fdctrl->data_pos < FD_SECTOR_LEN);
+
+ if (pos == 0) {
+ /* The first byte specifies the command. Now we start reading
+ * as many parameters as this command requires. */
+ cmd = get_command(value);
+ fdctrl->data_len = cmd->parameters + 1;
+ if (cmd->parameters) {
+ fdctrl->msr |= FD_MSR_RQM;
+ }
+ fdctrl->msr |= FD_MSR_CMDBUSY;
+ }
+
+ if (fdctrl->data_pos == fdctrl->data_len) {
+ /* We have all parameters now, execute the command */
+ fdctrl->phase = FD_PHASE_EXECUTION;
+
+ if (fdctrl->data_state & FD_STATE_FORMAT) {
+ fdctrl_format_sector(fdctrl);
+ break;
+ }
+
+ cmd = get_command(fdctrl->fifo[0]);
+ FLOPPY_DPRINTF("Calling handler for '%s'\n", cmd->name);
+ cmd->handler(fdctrl, cmd->direction);
}
+ break;
- pos = command_to_handler[fdctrl->fifo[0] & 0xff];
- FLOPPY_DPRINTF("treat %s command\n", handlers[pos].name);
- (*handlers[pos].handler)(fdctrl, handlers[pos].direction);
+ case FD_PHASE_RESULT:
+ default:
+ abort();
}
}
diff --git a/hw/ide/macio.c b/hw/ide/macio.c
index 585a27bd6c..dd52d50732 100644
--- a/hw/ide/macio.c
+++ b/hw/ide/macio.c
@@ -51,8 +51,15 @@ static const int debug_macio = 0;
#define MACIO_PAGE_SIZE 4096
+/*
+ * Unaligned DMA read/write access functions required for OS X/Darwin which
+ * don't perform DMA transactions on sector boundaries. These functions are
+ * modelled on bdrv_co_do_preadv()/bdrv_co_do_pwritev() and so should be
+ * easy to remove if the unaligned block APIs are ever exposed.
+ */
+
static void pmac_dma_read(BlockBackend *blk,
- int64_t sector_num, int nb_sectors,
+ int64_t offset, unsigned int bytes,
void (*cb)(void *opaque, int ret), void *opaque)
{
DBDMA_io *io = opaque;
@@ -60,76 +67,48 @@ static void pmac_dma_read(BlockBackend *blk,
IDEState *s = idebus_active_if(&m->bus);
dma_addr_t dma_addr, dma_len;
void *mem;
- int nsector, remainder;
+ int64_t sector_num;
+ int nsector;
+ uint64_t align = BDRV_SECTOR_SIZE;
+ size_t head_bytes, tail_bytes;
qemu_iovec_destroy(&io->iov);
qemu_iovec_init(&io->iov, io->len / MACIO_PAGE_SIZE + 1);
- if (io->remainder_len > 0) {
- /* Return remainder of request */
- int transfer = MIN(io->remainder_len, io->len);
+ sector_num = (offset >> 9);
+ nsector = (io->len >> 9);
- MACIO_DPRINTF("--- DMA read pop - bounce addr: %p addr: %"
- HWADDR_PRIx " remainder_len: %x\n",
- &io->remainder + (0x200 - transfer), io->addr,
- io->remainder_len);
+ MACIO_DPRINTF("--- DMA read transfer (0x%" HWADDR_PRIx ",0x%x): "
+ "sector_num: %" PRId64 ", nsector: %d\n", io->addr, io->len,
+ sector_num, nsector);
- cpu_physical_memory_write(io->addr,
- &io->remainder + (0x200 - transfer),
- transfer);
+ dma_addr = io->addr;
+ dma_len = io->len;
+ mem = dma_memory_map(&address_space_memory, dma_addr, &dma_len,
+ DMA_DIRECTION_FROM_DEVICE);
- io->remainder_len -= transfer;
- io->len -= transfer;
- io->addr += transfer;
+ if (offset & (align - 1)) {
+ head_bytes = offset & (align - 1);
- s->io_buffer_index += transfer;
- s->io_buffer_size -= transfer;
+ MACIO_DPRINTF("--- DMA unaligned head: sector %" PRId64 ", "
+ "discarding %zu bytes\n", sector_num, head_bytes);
- if (io->remainder_len != 0) {
- /* Still waiting for remainder */
- return;
- }
+ qemu_iovec_add(&io->iov, &io->head_remainder, head_bytes);
- if (io->len == 0) {
- MACIO_DPRINTF("--- finished all read processing; go and finish\n");
- cb(opaque, 0);
- return;
- }
+ bytes += offset & (align - 1);
+ offset = offset & ~(align - 1);
}
- if (s->drive_kind == IDE_CD) {
- sector_num = (int64_t)(s->lba << 2) + (s->io_buffer_index >> 9);
- } else {
- sector_num = ide_get_sector(s) + (s->io_buffer_index >> 9);
- }
+ qemu_iovec_add(&io->iov, mem, io->len);
- nsector = ((io->len + 0x1ff) >> 9);
- remainder = (nsector << 9) - io->len;
+ if ((offset + bytes) & (align - 1)) {
+ tail_bytes = (offset + bytes) & (align - 1);
- MACIO_DPRINTF("--- DMA read transfer - addr: %" HWADDR_PRIx " len: %x\n",
- io->addr, io->len);
+ MACIO_DPRINTF("--- DMA unaligned tail: sector %" PRId64 ", "
+ "discarding bytes %zu\n", sector_num, tail_bytes);
- dma_addr = io->addr;
- dma_len = io->len;
- mem = dma_memory_map(&address_space_memory, dma_addr, &dma_len,
- DMA_DIRECTION_FROM_DEVICE);
-
- if (!remainder) {
- MACIO_DPRINTF("--- DMA read aligned - addr: %" HWADDR_PRIx
- " len: %x\n", io->addr, io->len);
- qemu_iovec_add(&io->iov, mem, io->len);
- } else {
- MACIO_DPRINTF("--- DMA read unaligned - addr: %" HWADDR_PRIx
- " len: %x\n", io->addr, io->len);
- qemu_iovec_add(&io->iov, mem, io->len);
-
- MACIO_DPRINTF("--- DMA read push - bounce addr: %p "
- "remainder_len: %x\n",
- &io->remainder + 0x200 - remainder, remainder);
- qemu_iovec_add(&io->iov, &io->remainder + 0x200 - remainder,
- remainder);
-
- io->remainder_len = remainder;
+ qemu_iovec_add(&io->iov, &io->tail_remainder, align - tail_bytes);
+ bytes = ROUND_UP(bytes, align);
}
s->io_buffer_size -= io->len;
@@ -137,15 +116,15 @@ static void pmac_dma_read(BlockBackend *blk,
io->len = 0;
- MACIO_DPRINTF("--- Block read transfer - sector_num: %"PRIx64" "
- "nsector: %x\n",
- sector_num, nsector);
+ MACIO_DPRINTF("--- Block read transfer - sector_num: %" PRIx64 " "
+ "nsector: %x\n", (offset >> 9), (bytes >> 9));
- m->aiocb = blk_aio_readv(blk, sector_num, &io->iov, nsector, cb, io);
+ m->aiocb = blk_aio_readv(blk, (offset >> 9), &io->iov, (bytes >> 9),
+ cb, io);
}
static void pmac_dma_write(BlockBackend *blk,
- int64_t sector_num, int nb_sectors,
+ int64_t offset, int bytes,
void (*cb)(void *opaque, int ret), void *opaque)
{
DBDMA_io *io = opaque;
@@ -153,90 +132,80 @@ static void pmac_dma_write(BlockBackend *blk,
IDEState *s = idebus_active_if(&m->bus);
dma_addr_t dma_addr, dma_len;
void *mem;
- int nsector, remainder;
- int extra = 0;
+ int64_t sector_num;
+ int nsector;
+ uint64_t align = BDRV_SECTOR_SIZE;
+ size_t head_bytes, tail_bytes;
+ bool unaligned_head = false, unaligned_tail = false;
qemu_iovec_destroy(&io->iov);
qemu_iovec_init(&io->iov, io->len / MACIO_PAGE_SIZE + 1);
- if (io->remainder_len > 0) {
- /* Return remainder of request */
- int transfer = MIN(io->remainder_len, io->len);
+ sector_num = (offset >> 9);
+ nsector = (io->len >> 9);
- MACIO_DPRINTF("--- processing write remainder %x\n", transfer);
- cpu_physical_memory_read(io->addr,
- &io->remainder + (0x200 - transfer),
- transfer);
+ MACIO_DPRINTF("--- DMA write transfer (0x%" HWADDR_PRIx ",0x%x): "
+ "sector_num: %" PRId64 ", nsector: %d\n", io->addr, io->len,
+ sector_num, nsector);
- io->remainder_len -= transfer;
- io->len -= transfer;
- io->addr += transfer;
+ dma_addr = io->addr;
+ dma_len = io->len;
+ mem = dma_memory_map(&address_space_memory, dma_addr, &dma_len,
+ DMA_DIRECTION_TO_DEVICE);
- s->io_buffer_index += transfer;
- s->io_buffer_size -= transfer;
+ if (offset & (align - 1)) {
+ head_bytes = offset & (align - 1);
+ sector_num = ((offset & ~(align - 1)) >> 9);
- if (io->remainder_len != 0) {
- /* Still waiting for remainder */
- return;
- }
+ MACIO_DPRINTF("--- DMA unaligned head: pre-reading head sector %"
+ PRId64 "\n", sector_num);
- MACIO_DPRINTF("--> prepending bounce buffer with size 0x200\n");
+ blk_pread(s->blk, (sector_num << 9), &io->head_remainder, align);
- /* Sector transfer complete - prepend to request */
- qemu_iovec_add(&io->iov, &io->remainder, 0x200);
- extra = 1;
- }
+ qemu_iovec_add(&io->iov, &io->head_remainder, head_bytes);
+ qemu_iovec_add(&io->iov, mem, io->len);
- if (s->drive_kind == IDE_CD) {
- sector_num = (int64_t)(s->lba << 2) + (s->io_buffer_index >> 9);
- } else {
- sector_num = ide_get_sector(s) + (s->io_buffer_index >> 9);
+ bytes += offset & (align - 1);
+ offset = offset & ~(align - 1);
+
+ unaligned_head = true;
}
- nsector = (io->len >> 9);
- remainder = io->len - (nsector << 9);
+ if ((offset + bytes) & (align - 1)) {
+ tail_bytes = (offset + bytes) & (align - 1);
+ sector_num = (((offset + bytes) & ~(align - 1)) >> 9);
- MACIO_DPRINTF("--- DMA write transfer - addr: %" HWADDR_PRIx " len: %x\n",
- io->addr, io->len);
- MACIO_DPRINTF("xxx remainder: %x\n", remainder);
- MACIO_DPRINTF("xxx sector_num: %"PRIx64" nsector: %x\n",
- sector_num, nsector);
+ MACIO_DPRINTF("--- DMA unaligned tail: pre-reading tail sector %"
+ PRId64 "\n", sector_num);
- dma_addr = io->addr;
- dma_len = io->len;
- mem = dma_memory_map(&address_space_memory, dma_addr, &dma_len,
- DMA_DIRECTION_TO_DEVICE);
+ blk_pread(s->blk, (sector_num << 9), &io->tail_remainder, align);
- if (!remainder) {
- MACIO_DPRINTF("--- DMA write aligned - addr: %" HWADDR_PRIx
- " len: %x\n", io->addr, io->len);
- qemu_iovec_add(&io->iov, mem, io->len);
- } else {
- /* Write up to last complete sector */
- MACIO_DPRINTF("--- DMA write unaligned - addr: %" HWADDR_PRIx
- " len: %x\n", io->addr, (nsector << 9));
- qemu_iovec_add(&io->iov, mem, (nsector << 9));
+ if (!unaligned_head) {
+ qemu_iovec_add(&io->iov, mem, io->len);
+ }
+
+ qemu_iovec_add(&io->iov, &io->tail_remainder + tail_bytes,
+ align - tail_bytes);
- MACIO_DPRINTF("--- DMA write read - bounce addr: %p "
- "remainder_len: %x\n", &io->remainder, remainder);
- cpu_physical_memory_read(io->addr + (nsector << 9), &io->remainder,
- remainder);
+ bytes = ROUND_UP(bytes, align);
- io->remainder_len = 0x200 - remainder;
+ unaligned_tail = true;
+ }
- MACIO_DPRINTF("xxx remainder_len: %x\n", io->remainder_len);
+ if (!unaligned_head && !unaligned_tail) {
+ qemu_iovec_add(&io->iov, mem, io->len);
}
- s->io_buffer_size -= ((nsector + extra) << 9);
- s->io_buffer_index += ((nsector + extra) << 9);
+ s->io_buffer_size -= io->len;
+ s->io_buffer_index += io->len;
io->len = 0;
- MACIO_DPRINTF("--- Block write transfer - sector_num: %"PRIx64" "
- "nsector: %x\n", sector_num, nsector + extra);
+ MACIO_DPRINTF("--- Block write transfer - sector_num: %" PRIx64 " "
+ "nsector: %x\n", (offset >> 9), (bytes >> 9));
- m->aiocb = blk_aio_writev(blk, sector_num, &io->iov, nsector + extra, cb,
- io);
+ m->aiocb = blk_aio_writev(blk, (offset >> 9), &io->iov, (bytes >> 9),
+ cb, io);
}
static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
@@ -244,19 +213,12 @@ static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
DBDMA_io *io = opaque;
MACIOIDEState *m = io->opaque;
IDEState *s = idebus_active_if(&m->bus);
- int64_t sector_num;
- int nsector, remainder;
+ int64_t offset;
- MACIO_DPRINTF("\ns is %p\n", s);
- MACIO_DPRINTF("io_buffer_index: %x\n", s->io_buffer_index);
- MACIO_DPRINTF("io_buffer_size: %x packet_transfer_size: %x\n",
- s->io_buffer_size, s->packet_transfer_size);
- MACIO_DPRINTF("lba: %x\n", s->lba);
- MACIO_DPRINTF("io_addr: %" HWADDR_PRIx " io_len: %x\n", io->addr,
- io->len);
+ MACIO_DPRINTF("pmac_ide_atapi_transfer_cb\n");
if (ret < 0) {
- MACIO_DPRINTF("THERE WAS AN ERROR! %d\n", ret);
+ MACIO_DPRINTF("DMA error: %d\n", ret);
ide_atapi_io_error(s, ret);
goto done;
}
@@ -270,6 +232,7 @@ static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
}
if (s->io_buffer_size <= 0) {
+ MACIO_DPRINTF("End of IDE transfer\n");
ide_atapi_cmd_ok(s);
m->dma_active = false;
goto done;
@@ -289,19 +252,13 @@ static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
goto done;
}
- /* Calculate number of sectors */
- sector_num = (int64_t)(s->lba << 2) + (s->io_buffer_index >> 9);
- nsector = (io->len + 0x1ff) >> 9;
- remainder = io->len & 0x1ff;
-
- MACIO_DPRINTF("nsector: %d remainder: %x\n", nsector, remainder);
- MACIO_DPRINTF("sector: %"PRIx64" %zx\n", sector_num, io->iov.size / 512);
+ /* Calculate current offset */
+ offset = (int64_t)(s->lba << 11) + s->io_buffer_index;
- pmac_dma_read(s->blk, sector_num, nsector, pmac_ide_atapi_transfer_cb, io);
+ pmac_dma_read(s->blk, offset, io->len, pmac_ide_atapi_transfer_cb, io);
return;
done:
- MACIO_DPRINTF("done DMA\n\n");
block_acct_done(blk_get_stats(s->blk), &s->acct);
io->dma_end(opaque);
@@ -313,16 +270,14 @@ static void pmac_ide_transfer_cb(void *opaque, int ret)
DBDMA_io *io = opaque;
MACIOIDEState *m = io->opaque;
IDEState *s = idebus_active_if(&m->bus);
- int64_t sector_num;
- int nsector, remainder;
+ int64_t offset;
MACIO_DPRINTF("pmac_ide_transfer_cb\n");
if (ret < 0) {
- MACIO_DPRINTF("DMA error\n");
+ MACIO_DPRINTF("DMA error: %d\n", ret);
m->aiocb = NULL;
ide_dma_error(s);
- io->remainder_len = 0;
goto done;
}
@@ -335,7 +290,7 @@ static void pmac_ide_transfer_cb(void *opaque, int ret)
}
if (s->io_buffer_size <= 0) {
- MACIO_DPRINTF("end of transfer\n");
+ MACIO_DPRINTF("End of IDE transfer\n");
s->status = READY_STAT | SEEK_STAT;
ide_set_irq(s->bus);
m->dma_active = false;
@@ -348,24 +303,16 @@ static void pmac_ide_transfer_cb(void *opaque, int ret)
}
/* Calculate number of sectors */
- sector_num = ide_get_sector(s) + (s->io_buffer_index >> 9);
- nsector = (io->len + 0x1ff) >> 9;
- remainder = io->len & 0x1ff;
-
- s->nsector -= nsector;
-
- MACIO_DPRINTF("nsector: %d remainder: %x\n", nsector, remainder);
- MACIO_DPRINTF("sector: %"PRIx64" %x\n", sector_num, nsector);
+ offset = (ide_get_sector(s) << 9) + s->io_buffer_index;
switch (s->dma_cmd) {
case IDE_DMA_READ:
- pmac_dma_read(s->blk, sector_num, nsector, pmac_ide_transfer_cb, io);
+ pmac_dma_read(s->blk, offset, io->len, pmac_ide_transfer_cb, io);
break;
case IDE_DMA_WRITE:
- pmac_dma_write(s->blk, sector_num, nsector, pmac_ide_transfer_cb, io);
+ pmac_dma_write(s->blk, offset, io->len, pmac_ide_transfer_cb, io);
break;
case IDE_DMA_TRIM:
- MACIO_DPRINTF("TRIM command issued!");
break;
}
@@ -561,15 +508,12 @@ static void ide_dbdma_start(IDEDMA *dma, IDEState *s,
BlockCompletionFunc *cb)
{
MACIOIDEState *m = container_of(dma, MACIOIDEState, dma);
- DBDMAState *dbdma = m->dbdma;
- DBDMA_io *io;
- int i;
s->io_buffer_index = 0;
if (s->drive_kind == IDE_CD) {
s->io_buffer_size = s->packet_transfer_size;
} else {
- s->io_buffer_size = s->nsector * 0x200;
+ s->io_buffer_size = s->nsector * BDRV_SECTOR_SIZE;
}
MACIO_DPRINTF("\n\n------------ IDE transfer\n");
@@ -578,15 +522,6 @@ static void ide_dbdma_start(IDEDMA *dma, IDEState *s,
MACIO_DPRINTF("lba: %x size: %x\n", s->lba, s->io_buffer_size);
MACIO_DPRINTF("-------------------------\n");
- for (i = 0; i < DBDMA_CHANNELS; i++) {
- io = &dbdma->channels[i].io;
-
- if (io->opaque == m) {
- io->remainder_len = 0;
- }
- }
-
- MACIO_DPRINTF("\n");
m->dma_active = true;
DBDMA_kick(m->dbdma);
}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-24 19:46:24 +0000